. L'histoire naturelle des plantes. La botanique. Fig. 73. Les fruits. Fig. 74. Trans, de secte, de fruits (j). Laserpitium (fig. 73, 74) a donné son nom à une tribu (Laserpitiece) ; nous le renvoyer à l'types. Le fruit est légèrement comprimé parallèle à l'commissural, et son principal et secondaire les crêtes sont visibles. Mais alors que le principal est linéaire et peu importante, le latifoiium Laserpitium secondaires sont développés dans tout le dentelatc. ou ailes, plat ou presque, en particulier les marginaux, qui sont ordinairement plus grandes que la nageoire dorsale. La semence, dans ce genre, est plat ou sMghtly con- cave sur t

• Contributeur: The Book Worm
• ID de l’image: RDG39X
• Taille du fichier: 7,2 MB (287,9 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1304 x 1917 px | 22,1 x 32,5 cm | 8,7 x 12,8 inches | 150dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

. The natural history of plants. Botany. Fig. 73. Fruit. Fig. 74. Trans, sect, of fruit (j). Laserpitium (fig. 73, 74) has given its name to a tribe (Laserpitiece) ; we refer it to the preceding types. The fruit is slightly compressed parallel to the commissure, and its primary and secondary ridges are visible. But whilst the primary are linear and little prominent, the secondary are developed Laserpitium latifoiium. into entire or dentelatc wings, flat or nearly so, especially the marginal, which are ordinarily larger than the dorsal. The seed, in this genus, is flat or sMghtly con- cave on the ventral sur- face. There are a score of species of Laserpitium, perennial herbs, glabrolis or hispid, with leaves, involucres and involucels formed of an indefinite number of linear bracts. They inhabit Europe, northern Africa and western Asia. Thapsia (fig. 76, 76) is very near Laserpitium. They are herbaceous and perennial plants. All the ridges of the fruit Thapsia garganica. are linear, except the marginal secondary, which are dilated into large membranous wings. More rarely the dorsal also become aliform but re- main much narrower. In the true Thapsia the ventral face of the seed is flat. In Elceoselinum, it becomes concave, with the margins much involute; so that it is to other Thapsias what Torilis is to Daucus proper. This genus is Mediterranean. Its fruit has vittse only under the secondary ridges. Fig. 75. Fruit (J). PolylopMum, a glabrous perennial herb of Persia and the neighbouring regions, has quite the organization of Laserpitium. But the ovoid fruit, dorsally com- pressed, has all the ridges dilated to short, undulate wings, divided and crumpled at the margin. In Melanoselinum (fig. 77, 78), native of Madeira and Cape Verd, the stem is often erect and woody, and the inflorescence is furnished with involucre and involucels. The primary ridges are little prominent and the two lateral occupy a portion of the internal face of the. Please note that these images ar

Recherche dans la banque de photos par tags

• bookcentury1800
• bookdecade1870
• booksubjectbotany
• bookyear1871